Distortion of charmonium formation amplitude by deconfined environment

Journal Article · Wed Nov 15 04:00:00 EST 1989 · Annals of Physics (New York); (USA)

DOI:https://doi.org/10.1016/0003-4916(89)90050-X· OSTI ID:6981265

Matsui, T ^[1]

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1. Center for Theoretical Physics, Laboratory for Nuclear Science and Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139 (US)

Dynamical origin of the {ital J}/{psi} suppression in ultrarelativistic nucleus-nucleus collisions is studied focussing on the formation mechaniusm of heavy quark bound states. We first derive a formula for a charmonium production cross section based on the gluon fusion model taking into account the distortion of the charmonium formation amplitude due to the change of the final state interaction between {ital {bar c}c} in the presence of deconfined environment for a short period after the collision. The modification of the charmonium production cross section for the two-gluon fusion process is studied with this formula using a schematic harmonic oscillator model for the intermediate and final {ital {bar c}c} bound states. It is shown that in the fully deconfined medium the charmonium formation probability attenuates smoothly on a characteristic time scale which is expected from the semiclassical consideration for the formation time'' of bound states; while in partially deconfined medium the formation probability oscillates with the frequency corresponding to that of the bound state in such medium. Our result indicates that there is no threshold behavior in {ital J}/{psi} suppression by the quark-gluon plasma formation and {ital p}{sub {ital T}} dependence is much weaker than expected from a simple model calculation assuming threshold behavior. {copyright} Academic Press, Inc.

• OSTI ID: 6981265
• Journal Information: Annals of Physics (New York); (USA), Journal Name: Annals of Physics (New York); (USA) Vol. 196:1; ISSN APNYA; ISSN 0003-4916
• Country of Publication: United States
• Language: English

Related Subjects

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON-BARYON INTERACTIONS
BOSONS
CHARGED-PARTICLE REACTIONS
CHARM PARTICLES
CHARMONIUM
CROSS SECTIONS
DIFFERENTIAL EQUATIONS
E1-TRANSITIONS
EIGENSTATES
ELECTRONIC EQUIPMENT
ELEMENTARY PARTICLES
ENERGY-LEVEL TRANSITIONS
EQUATIONS
EQUIPMENT
GLUONS
HADRON-HADRON INTERACTIONS
HADRONS
HARMONIC OSCILLATORS
HEAVY ION REACTIONS
INTERACTIONS
J PSI-3097 MESONS
LINEAR MOMENTUM
MATRIX ELEMENTS
MATTER
MESONS
MULTIPOLE TRANSITIONS
NUCLEAR MATTER
NUCLEAR REACTIONS
NUCLEON-NUCLEON INTERACTIONS
OSCILLATORS
PARTIAL DIFFERENTIAL EQUATIONS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
POSTULATED PARTICLES
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
QUARKONIUM
SCHROEDINGER EQUATION
TRANSVERSE MOMENTUM
VECTOR MESONS
WAVE EQUATIONS